Milk pasteurizer and cooler.



No. 879,346. PATENTED FEB.18, 1908. W. WILSON.

MILK PASTEURIZER AND COOLER.

APPLICATION FILED AUG. 21, 1907.

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WALTER WILSON, ORYEADON, PENNSYLVANIA.

MILK PASTEUBIZEB AND GOOLER'.

Specification of Letters Patent:

Jfatented Fen/1s, 1906.-

Application filed An l a 21. 190*]. Serial 1a. 339.509.

Be it known that I, WALTER Wnsos, a citizen of the United States, residing at -Yeadon, in the county of Delaware and State of Pennsylvania, have invented a new and useful Milk Pasteurizcr and Cooler, of which the following is a specification. v

This invention relates to milk pasteurizers. The object of the invention is to provide an apparatus of this character which shall combine simplicit of construction, high efficiency and dura ility in'use, one in which the arts shall be so assembled as to permit rea y'sep'aration for the purpose of cleanin or otherwise, and which will pasteurize mil ina rapid, certain'and thorough manner and without danger oi burning or overheating Jilin-milk, and will also as efficiently cool milk.

' with'the above and other objects in view as will appear as the nature of the invention is better understood, the same consists in the novel construction and'combination of parts of a milk pasteurlzer as will be hereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification and in which like characters of reference indicate corresponding parts,- Figure 1' is a view in side eleva tion partly in section, of an a paratus constructcd in accordance with t e present in? vention. .Fig. 2 is a top plan, view, paitly broken away. Fig. 3 is a horizontal sec-- tional view taken on the line 3-3 of Fig. 1. Fig. 4 is a detail view in side elevation othe inner heating chamber of the apparatus.

Fig. 5 is a sectional detailview of one of the clamping members for holdingthe two steam chambers assembled. Fig. 6 1s adetail sec tional view of a modified form of the invention.

The pasteurizer illustrated inFigs. 1, to 5 consists oi an outer water chamber 1. and an n inner water chamber ,2, these parts being constructed preferably of tinned copper. The outer chamber comprises two nested c lindcrs 3 and e, theiormcr of which is c osed at its lower end by a bottom 5 and the latter by a bottom l", The cylinder 4 ex.- tends some distance above the upper end of the cylinder 3" and the two are secured togcther by an annulus 7. y

The inner chamber 2, which consists of a single cylinder 8, is closed at its lower end by a bottom 9 andat its upperend by a cap or her 25 of a pipe coupler, the other member cover 10 which is provided with a depending flange 11 inset from the pefip'heryof' the cover and to the inner wall of which the cylinder is secured as by being soldered or riveted thereto. To the upper end of the cylinder 4 is secured, as by being riveted or soldered thereto, a collar 12, an as Well as the cover 10, is provided each wi l a pair of oppositely-aimed longitudinallyy, of which slotted cars 13 and 14 respective the former are provided with transv" e orificesthat are engaged by pins 15 one (5% beingshown. On the ins are looselynioun ed threaded bolts 16 w rich carry winged nuts 17 that are designed by engagement with the cars 14 to force the cover tightly upon a gasket 18 interposed between the cover and the collar 12, whereby to produce a steam tight joint. The milk heating chamber which is defined by the space between the cylinders 4 and 8 and the bottoms 6 and 9 is campers tively slight, whereby the chamber will have this collar,

a lar c superficial area and a small capacity there y to insure the thorough, rapid an economical heating of the milk. I

In order to retard the passage of the milk through the heating chamber, bailles 19 are provided, in this instance two in number, which are disposed externally of the cylinder 8 and preferably in diainetrio alinement, an extend from the cover 10110 points near the lower end of the c linder 8, asclearly shown in Fig. i. As wil be apparent, these baffles y will compel the milk to travel downward and upward the entire length of the cylinder before it escapes, and will thusinsure the rapid, even and thorough treatment of the milk without danger of overheating. These bafiles also subserve the further function of spacers to hold the cylinder centered with relation to the cylinder 9, additional spacers 20 being employed for this purpose which are disposed I at points midway between the battles and close to the lower end of the cyl'jnw der 8, as clearly shown in Fig. 3.

pipe 21 that connects with a suitable genera tor, not necessar to be shown. With this pipe is connectc by a three-way union 22, a pipe 23 which has coupled with it an exterision 24 that enters the cylinder 3 near its lower end. The union .22 carries one inenil- Steam is supplied to the apparatus by a,

' a ,rectangu 26 of which has a threaded connection with a thimble 27 carried by the cover 10, and this thimble has threaded into it a pipe 28 that extends nearly to the bottom of the cylinder 8, as clearly shown in Fig. 1 The two members 25 and 26 of the coupler are connected by a slip nut 29, whereby when this nut is loosened the member 26 may be swung to one side, for a purpose that will presently appear.

Cold milk is supplied to the heating chamber by a pipe 30, entering the cylinder 4 near its upper end, and escapes through a pipe 31 also entering the cylinder 4 near its upper end. These pipes are relatively large in diameter in order to permit free passage of the milk and also to facilitate cleaning.

In order to permit escape of the water from the chambers 1 and 2, there is an escape pipe 32 projected through the cover 10, and a similar pipe 33 projecting through the cylinder 3.

In the modification shown in Fig. 6, the only difference over that shown in Figs. 1 to 5 is that the cylinder 3 is extended up to the cover 10.

In order to effect rapid agitation and thus accelerated heating of the water in the two chambers 1 and 2, each of the pipes 24 and 28 has combined with itslowcr end a mixer comprising a jet nozzle 34 and a combining tube 35, the latter having a lateral intake 36 through which the water passes to the tube and thence along with the condensed steam to the respective chambers.

Under some conditions it may be desired to reduce the capacity of the chamber 1 without changing the capacity of the heating chamber 37, as when milk is to be cooled, and to secure this, a filler or s ace reducer 38 is employed which is a hol ow open-sided ar structure of sheet metal secured to the outer wall of the cylinder 4 and preferably, though not of necessity, abuts the inner Wall of the cylinder 3 and extends from the annulus 7 to a point near the lower end of the cylinder 4, as clearly shown in Fig. 1. This filler will of course materially l essentl1e capacity of the chamber 1 and will consequently lighten the structure as a whole and make it easier to handle.

The filler will generally be employed only on lar e pastcurizers, and the mixers only when the apparatus is used for heating milk, it bein obvious that the 7 would be of no particular utility when cooling is to be cffected.

To remove any small quantity of milk that remains in the chamber 37, after the conclusion of the operation of either pastcurizing or of cooling milk, a faucet BQ is-employci'l that is disposed exteriorlyot'thc chamber 1 and communicates with the bottom portion of the cylinder 4. a

The operation of the device when used as a pasteurizer will be as follows: Milk from a suitable source is allowed to pass through the pipe 30 into the heating chamber 37, whence it passes down around one-half of the circumference of the cylinder 2, this being effected by the baffles 19, thence passes around the bottom of" the cylinder 8 and upward around the other side of the cylinder 2 to the escape 31. Of course it will be understood that prior to the admission of milk, hot water is supplied to the chambers 1 and 2, through the pipes 24 and 28, and then steam is supplied through the same pipes to the chambers. Owing to the provision of the mixers, the water will be drawn into the intakes 36 and discharged through the combining tubes 35 along with the condensed steam, and this constant discharge will 0 erate to agitate the entire contents of bot 1 of the chambers and thus secure rapid and e. u heating thereof. As the feed of the milk will be by gravit it will be comparatively slow so that amp e time Will be afforded to effect thorough pasteurizing. When the operation has been completed the nut 29 is loosened and the pi as member 26 is turned to one side, after which the winged nuts 17. are loosened and swurw outward, thereby leaving th'cover free to be lifted by a handle 40 secured to the cover. This leaves the interior" of the heating chamber free to be thoroughly cleansed as also the cylinder 2 and pipes 28 and 2,6.

It will be understood of course that this apparatus may be employed for cooling milk merely by supplying brine or any other cooling medium to the chambers 1 and 2 instead of steam, and as above stated, under this latter use the mixers may be omitted, although if preferred they may be employed thus to constitute the apparatus a combined pasteurizer and cooler.

What is claimed is 1. A milk pasteurizer embodying spaced inner and outer water chambers defining a heating chamber, and vertically disposedbaifies for causing the liquid being treated to pursue a tortuous passage before escape.

2. A milk pasteurizcr comprisin inner and outer water chambers definin aIieating chamber, and vertically disposed baliies carried by the inner chamber and extending from its upper end to a point near its lower end.

3. A pasteurizer com rising inner and outer water chambers cfining a heatin chamber, vertically disposed 'baflies arranget within the latter chamber and constituting ,means'for holding the two chambers properlyspaced. 4. A milk pasteurizer embodying spaced inner and outer water chambers defining a heating chamber, pipes for supplying steam to the water chambers, and mixers 011 the pipes for agitating the water within the said chambers, one ol' whichjfmixers discharges downward against the floor of the inner In testimony that I claim th foregqing as chamber and the other of which discharges my own, I have hereto afiixed' orizontaliy of the outer chamber.

my signature 1 m the presence of two witnesses.

Imlk pasteurizer embodying sp'aced r v WALTER WILSON. lnner and outer water chambers defining a Witnesses: v leatlng chamber, and a space reducer aranged between th JOSEPH P. BAUMAN, -JULngs KRIDER. 

